Motor-cycle frame.



A. A. HORTON.

MOTOR CYCLE FRAME.

APPLIOATIOH FILED JAN. 21. 1911.

1,010,142. Patented Nov. 28, 1911.

\ i l l the arc of a. circle which. is mnccntric with UNITED err;

ALLEN A. HORTON, 0F DETROIT, M1CHIGQALII.

MOTO'RCYGI1E FRAME.

Specification of Lettcrs Patent. P2|M llt0i| N0". 28, 1911.

Application filed January 21, 1911. Serial NUIGUSflIG.

1h (1/! whom 2'! may romern:

1h. it known that l. .\|.|.i:x llon'rom; a (-itizon of tho nitial Slalom. residing at A lh-troit. connty' l' ll'aync. Hlato o! .ilichij gun, hare i-nrcntwl a curtain now and nscl'nl lntprorona-nt in Motui'-(, .'l(' Frames. and i ileclarc tho following to l a full. clear. and i exact ilcaoription of the name. such as will enable others skilled in the art to which it pcrtaina to make and use thr same, reference being had to the avwnnpaIrving ilrnwingnp which form a part at this hll i'killlt'lltltln.

This invention relates to motor cycle frames. l

I t has for its object on improved connec tion. hctwven that part. of the frame whit-h carries tho engine and that part of the frame to which thitrear whcc] is secured hy nicans of which the roar whocl is pcrinittcd to rise and fall through a comiilcralile range of movement. without 'lmnging its hand distance from the driving ahaft of the engine. This is effected hy tonstrncting a's ;tcn1 of links which unite the ports and which have their centersot' movement so arranged that;

the mile of the wheel may rise and fall in the shaft of the engine.

In the drawings: Figurc l, 1 side clevatiun of the motor cyclcwith the links in place. Fig. 2. is a side elcvation showing the linkage which connectsthe rear wheel to the frame. Fig. I}, shows the same linkage in a different position.

The engine 1 is sci-arm] in the ordinary way upon. the frame which supports the scat; 2. and tho other adjuncts of the machinc, and has connected with it the rear wheel 3 which is scoured bctwccn a pair of link bars' (seen lll-(lUYtlllUl'l in Figs. 2 and 3). "The main bar 4. which is a compound or ll'llHSQtl bar, consisting of members 5 and (i. anu provided at one end with a seat 8 in which the axlc 7 of the win-cl cngages, unit at the other and, members of tho trussi-(l bar are engagctl by fork Incinbor l) which in pirotally eonm-otml to a link It) and pirolally connected to a link 14; the link It) is connected by pivot 11. to afixed part 12 of the frame, and the fork 9 and tho link l-l are pivotally connt ctcd to the l'rmnc 12 by pimt 15 The two links 10 and It swing in arm which a re substantially at right a nglun one to thc othcr and aropropoi-tinned to give to the free end of the trnnsecl member which contains tho httlt S a path that is wry nearly in the arc of a true circlo having its ov'ntcr at tho crntcr of the shaft it; ot'ihv cngzino no ('loscly that in n lnorvnmiit ol' sorvr al inches vvrtlcnlly the deviation from a true circle i:-: so small as to he nogligiblc. The link l is supported to the frainc by a spring contained in the npring owing 1T. ll moans of this arrangenicnt it is provishnl that a lhiwn bolt/wheel jtion.

, \Vhat I chain] is:--

1. As a means of canning; tln frcc 0nd of the link to more concentric to a given point, a link hanging from the fi'anieliaving an end wringing in a suhstantiallv horizontal plane. a second link hanging from the frame having its moving c'nd adapted to more in a nnlmtantinlly wrtie'al arc. and at link piv otcd to t l'lil lifl llzfflilfll moving (Eltl ol' the firsbmentioncd link and to the vertical moving end of the second-meationcd link. sub stantially as described,

2. in a motor ryclu, the combination of an engine. a shaft ilriwn thcrchy, n frame supporting said unginv, a rear whccl. a main bar in which .-;ai l rear wheel acatclt. a hand passed OiLhlllt. shaft and ailaptt-(i to revolve the roar wheel, a link connecting the suit] main bar to the frame and normall lying horizontal. and a second link connecting saicl bar to the frame and normally lying in vcrtiral position. the .aahl links be ing arranged between tlncnginc and rcur wheel and adapted to rontinc the oscillation of the rear wheel to an arc approximately concentric to the shaft, thereby nminlaining an nln'arying tcnsion of tho band, substantially as (lesrribcd. V

3'. in a motor cycle, the combination of an" cnginc. a shaft; rlrirt'n thereby, it frame suppmting said engine, a rear wheel, a main liar comprising truss bar's at. the rear end of which the said wheel is seated; 9. fork bar attached to the opposite end of said trons bars, a link connecting the forked member to the frame anfil adapted to oscillate in a substantially vertical are, a s eoond link forward of the first-mentioned linkconnecting said forked member to the frame band is maintained, substantially as de member and adapted to oscillate in a subscribed. 10 stuntiully horizontal are, the said links being l In testimony whereof, sign this specifiarranged to confine the oscillation of the l cation in the presence of two Witnesses.

. rear wheel to an are approximately eon- ALLEN A. HORTON.

centric to the shaft, and a band passed over Witnesses: the shaft and adapted to revolve the rear VVILLIAM M. SWAN, wheel, whereby an unvarying tension of the CHARLES 0. JENNINGS. 

